Electrostatics Pre-Assessment

When you brush your hair you scrape off electrons, and your hair

• becomes positively charged
• becomes negatively charged
• becomes positively and negatively charged
• remains uncharged, or neutral

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

When we say charge is conserved, we mean that charge can

• only be transferred from one place to another
• transform into equivalent forms
• be created or destroyed

Tags

NGSS.HS-PS2-5

As a pair of charges is brought close together, the force between them

• Increases
• Decreases
• Increases only if they are the same sign
• Increases only if they are the opposite sign

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

When a negatively charged balloon is brought close to a wall, the positive charges in the wall are

• attracted to the balloon
• repelled from the balloon
• too bound to be affected by the balloon
• neutralized

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

If a storm cloud is negatively charged on bottom, and equally as positively charged on top

• the net charge is negative
• the net charge is positive
• the net charge is zero

Gravitational force depends on mass.  What comparable quantity governs the electrical force?

• Volume
• Density
• Charge
• Charge density

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Is an electron in a Uranium atom the same as an electron in a Hydrogen atom?

• Yes
• No
• Yes, but only when both atoms are neutral
• Yes, but only when they are equidistant from the nucleus

Which has more mass?

• Proton
• Electron

Which has more charge?

• Proton
• Neutron
• Electron
• None

Why don't we feel electrical forces if that force is far greater than gravity?

• Gravity is on a macroscopic scale only
• Electric force acts on a microscopic scale only
• Charges cancel, but mass cannot